math-fxns.dart

double add(double firstNum, double secondNum) {
  return firstNum + secondNum;
}
double subtract(double firstNum, double secondNum) {
  return firstNum - secondNum;
}
double multiply(double firstNum, double secondNum) {
  return firstNum * secondNum;
}
double divide(double firstNum, double secondNum) {
  return firstNum / secondNum;
}